[Solved] Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘change page_content’ not found or invalid function name in
Last Updated on 2022-01-15 by Clay
Today when I trying to add a new function on my WordPress website, the code I create have no any display, but there is a new warning message pop up:
Read More »[Solved] Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘change page_content’ not found or invalid function name in